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Radiant|Lab Grown|IGI

1.66ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG825660150

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG825660150

Diamond specifications and retailer prices

From £396 GBP
$531 USD
As of October 30, 2026
Save £1,865 GBP (82%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £2,844 GBP at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.66ct lab-grown radiant diamond

This 1.66ct lab-grown radiant sits in the one-and-a-half to two carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG825660150 or 825660150. Listed at 22 retailers as of October 30, 2026, with a 471% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.66
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.5°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG825660150
Dimensions7.97 × 5.88 × 4.05 mm
L/W Ratio1.36
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.97 mm5.88 mm1.66 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG825660150
Side View
Table 65.0%Crown 46.5°Girdle: MediumPavilion 36.4°Culet: NoneDepth 68.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £2,844 GBP|Low: £396 GBP|High: £2,877 GBP|Avg: £1,212 GBP|-1.2%
Rare Carat
Retailer 2
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Retailer 22
November 1, 2026
Retailer 3£396 GBP
Retailer 11£443 GBP
Retailer 22£443 GBP
Retailer 5£491 GBP
Retailer 7£491 GBP
Retailer 19£593 GBP
Retailer 10£659 GBP
Retailer 16£746 GBP
Retailer 13£756 GBP
Retailer 4£761 GBP
Retailer 18£844 GBP
Retailer 9£957 GBP
Retailer 21£1,099 GBP
Retailer 8£1,292 GBP
Retailer 12£1,433 GBP
Retailer 14£1,550 GBP
Retailer 15£1,596 GBP
Retailer 20£1,714 GBP
Retailer 2£2,050 GBP
Retailer 6£2,146 GBP
Retailer 17£2,261 GBP
Rare Carat£2,844 GBP

32 data points across 22 retailers

22 retailers£396 GBP to £2,261 GBP

A
Cheapest Retailer
-
£396 GBP
$531 USD
A
Retailer 2
-
£443 GBP
$594 USD
View
Final sale: no returns
A
Retailer 3
-
£443 GBP
$594 USD
View
Retailer 4
-
£491 GBP
$658 USD
View
Price last confirmed 16 days ago
A
Retailer 5
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£491 GBP
$658 USD
View
A
Retailer 6
-
£593 GBP
$795 USD
View
A
Retailer 7
-
£659 GBP
$883 USD
View
A
Retailer 8
-
£746 GBP
€952 EUR
View
A
Retailer 9
-
£756 GBP
View
A
Retailer 10
-
£761 GBP
$1,019 USD
View
A
Retailer 11
-
£844 GBP
ZAR 18,272 ZAR
View
B+
Retailer 12
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£957 GBP
$1,282 USD
View
B+
Retailer 13
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£1,099 GBP
$1,473 USD
View
B+
Retailer 14
-
£1,292 GBP
$1,731 USD
View
B+
Retailer 15
-
£1,433 GBP
View
B+
Retailer 16
-
£1,550 GBP
SGD 2,806 SGD
View
B+
Retailer 17
-
£1,596 GBP
$2,138 USD
View
B+
Retailer 18
-
£1,714 GBP
$2,297 USD
View
B
Retailer 19
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£2,050 GBP
View
B
Retailer 20
-
£2,146 GBP
$2,876 USD
View
B
Retailer 21
-
£2,261 GBP
$3,030 USD
View
Most Expensive
Rare Carat
PE-239738 · Oct 18
£2,844 GBP
$3,810 USD
View
Price last confirmed 14 days ago
21 more retailers have this diamond
Prices start from £396 GBPSave up to £1,865 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.66ct Radiant
£396 GBP